240438364391 has 16 divisors (see below), whose sum is σ = 250799551968. Its totient is φ = 230305420800.

The previous prime is 240438364381. The next prime is 240438364393. The reversal of 240438364391 is 193463834042.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240438364391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240438364393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1280171 + ... + 1455923.

It is an arithmetic number, because the mean of its divisors is an integer number (15674971998).

Almost surely, 2^240438364391 is an apocalyptic number.

240438364391 is a deficient number, since it is larger than the sum of its proper divisors (10361187577).

240438364391 is a wasteful number, since it uses less digits than its factorization.

240438364391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176402.

The product of its (nonzero) digits is 1492992, while the sum is 47.

The spelling of 240438364391 in words is "two hundred forty billion, four hundred thirty-eight million, three hundred sixty-four thousand, three hundred ninety-one".